You can now always delete instantly your own comments. If the comments are deleted by the OP, rather than by the vote process, the comment will be visible only to the OP and moderators -- high reputation users will not be able to see it.

You can now also instantly undelete your own comments if you deleted them yourself. If deleted by a moderator, or by the vote process, you can still vote to undelete.

Comments are now green if they have a rating of +10.

Added two new sorting options (newest first and oldest first)

The sorting algorithm you choose will stick until you choose another

Added the patch along with the date in replies

UI/design improvements for replies

Added downvoting to replies

Added a way to report replies to moderators

Things that are planned

A way to edit replies

Things that we are considering

A feature for moderators to convert comments to replies and vice-versa